So, I want to play in a way that I don't make white's move work well with his stone in the upper right. First, a few rejections:
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[go]$$Bc
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . 3 1 2 . . . . . . . O . . . . . |
$$ | . . X , O 4 . . . 6 . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 5 . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
This type of play seems to help white make his stone in the upper right look well placed. I'd also rather not invite the possibility of an avalanche, as white's bottom right will break ladders and giving white the left side strength begs for white to get a favourable approach to the bottom left.
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[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 3 2 4 . . . . 6 . . . . O . . . . . |
$$ | . . X , O . . . . , . . . . . , X . . |
$$ | . 5 . . . . . . . . . . . . . . . . . |
$$ | . . . 1 . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
I don't like this, or other moves on the left, either, since white still has good shape across the top. The outside attachment (not shown) does build the left, but at the expense of the corner and giving white decent strength on top.
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[go]$$Bc
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O . . . . . |
$$ | . . X , O . . 1 . 6 . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 3 . 2 . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 5 . 4 . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |[/go]
I have considered this pincer, but I feel white can counterattack too easily while fixing his shape. The three space pincer instead is tempting, but I think it gives white a lot of scope for action in the corner, and it doesn't impede O17 from making a base later either. On the other hand, it could be played as a kikashi of sorts, making it hard for white to get a lot from the top. Black could treat it lightly and then move it out later as the circumstances allow.
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[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 9 . . 8 . . . . . . . . . . . . . |
$$ | . 0 2 3 5 6 1 . . . . . . O . . . . . |
$$ | . . X 4 O 7 . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |[/go]
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[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . 1 O 3 . . . . . . . . . . . . |
$$ | . O O X X O X . . . . . . O . . . . . |
$$ | . . X O O X 5 . . , . . . . . , X . . |
$$ | . . 2 . a 4 . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |[/go]
This joseki is old but I think may work ok here. Black gets thickness to later harrass the upper left a bit, and can aim at the cut at A. There's no guarantee my opponent will play it though. In addition, black loses sente, so white will likely approach the last corner. I expect I could play a loose pincer if it comes to that. It's also not the easiest to attack the upper right stone, so maybe it's not that ideal here.
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[go]$$Bc
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 4 . . . . . . . . . . . . . . . . . |
$$ | . . . 2 . . 1 . . 5 . . . O . . . . . |
$$ | . . X . O . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . 3 . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |[/go]
If white plays to split, I think I could be comfortable with something like this.
And now for tenuki...
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[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O . . . . . |
$$ | . . X , O . . . . , . . . . . , X . . |
$$ | . . b . . . . . . . . . . . . . . . . |
$$ | . . . a . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . d . . |
$$ | . . . 1 . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . c . . . . . O . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
A move like
or the low enclosure to simply enclose the corner seems attractive. It increases the size of a move on the bottom. If white A or B, black can aim to end in sente for C. If white C, black can approach at D and end in sente if white pincers. That doesn't tell me what to do on the upper side, though.
Indeed, because Q4 is low, I'm inclined to think that C3 and R16 have already limited its potential, and so I should move on to my own.
This leaves me thinking about the 3 space high pincer, the 1 space low, the corner enclosure, and now I'm revisiting the knight's move extension.
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[go]$$Bc
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X O O . . . . O . . . . O . b . . . |
$$ | . . X , O . . . . , . . . . . , X . . |
$$ | . X . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . a . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . . . . . . . O . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
At this point, black has sente and there are two points that come to mind, A and B. If A...
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[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X O O . . . . O . . . . O . . . . . |
$$ | . . X , O . . . . , . . . . . , X . . |
$$ | . X . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 3 . . |
$$ | . . 1 . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . 2 . . . . . O . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
The bottom becomes big and I think white will play there to limit black's development. On the other hand, it calls for black to approach the corner on the other side. I think I would be satisfied as black to either take the corner in sente or get a good side position here. I'm not very clear on 6-3 joseki myself, but I imagine white would later aim to press black's top right down while building in the center.
If black were to take B, on the other hand, I'm sure white would immediately approach the last corner, and black does have an invasion to aim at later, but it's not the most compelling. White is vulnerable to a shoulder hit on the central stone or a cap there later anyways.
I think I'm going to play this last way (A) because I want to make sure I stay high enough to compete later. If white tenukis
a high pincer followup is quite severe.
I may have just overanalysed this, though, and am waffling. Perhaps the other move order, enclosure first, is better. It's certainly an orthodox move, in terms of completing a corner. The other two can go into 5-4 or 6-3 joseki fine. I need to think about these things less.